NEPHRODIUM — -NORWAY SPRUCE. 279 



ICephrodium. See Ferns. 

 Nephrolepis. See Ferns. 

 Nerine (Guernsey Lily). AmaryUidacea. 



Seeds, for new varieties. Commonly increased by 

 means of bulbels. 



Nerium (Oleander). Apocynacecs . 



Layers. Cuttings should be made of natural leading 

 shoots, inserted in single pots and placed in a close, warm 

 frame ; or they may be rooted in bottles of water and 

 afterwards potted in soil. See Fig. 69 a. 



Nertera . Rubiacece . 



Increased by seeds, divisions, or cuttings. Any small 

 portion will grow freely, especially if placed in a warm 

 frame. 



Nettle-tree. See Celtis. 



New Zealand Flax. See Phormium. 



Nicandra. Solanacecs . 



Seeds, sown in the open border, or under glass in the 

 north. 



Nicotiana (Tobacco). Solanacea. 



Propagated by seeds, started under glass or in a care- 

 fully prepared seed-bed. The ornamental species some- 

 times by cuttings. N. alata (N. affinis of gardens) prop- 

 agates by root cuttings. Tobacco is handled essentially 

 like tomato plants. 



Nierembergia. Solanacecs. 



Grown from seeds, under glass. Cuttings of firm shoots 

 are also used. 



Nigella (Fennel Flower, Love-in-a-mist). Ranunculacece . 



Propagated by seeds sown in early spring in the open 

 Nightshade. See Solanum. 

 Nine-bark. See Spiraea. 

 Nolana. ConvolvulacecB . 



Seeds sown in the open border during spring. 

 Norfolk Island Pine. See Araucaria. 

 Norway Spruce. See Picea. 



